So i bought a 1gig RAM stick for my iBook for Kahlon. Kahlon said that this RAM was supported for my iBook. The specs for my iBook are 12in, 1.2 Ghz, 120gb hard drive and 1.25 gigs of RAM. Ok so I put in my RAM in about March and it worked fine for about 3 months. Then in late July my Mac started showing the "Grey Screen of Death." So i thought that it might of been the hard drive so i did some repairs and nothing changed. So then after that I reformatted my hard drive and reinstall Tiger and nothing changed either. So i finally took out my RAM and tested to see if that was the problem and low and behold my computer ran fine (a little slow because it was was running on 256mb of RAM but it ran fine for about a week). Then I put the RAM back on in it but the Computer only read that the 1gig stick was actually a 512mb RAM stick but it still worked fine for a week until I installed a update and so I had to restart my computer (restart being the Key Word). So when I restarted my computer my computer recognized that it had a total of 1.25gigs of RAM. But when i went to start up itunes or any other application it would immediately show the "Grey Screen of Death." Does anyone know what could have happened I think that it is the Logic Board but I don't know.